High back chair



FIG. 1 is an isometric view of a high back chair;

FIG. 2 is a right side view thereof, wherein the left side view is a mirror image;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof; and,

FIG. 5 is a top view thereof. 

CLAIM The ornamental design for a high back chair, as shown and described. 